OKLAHOMA CITY—The suspicious and noisy package that caused evacuations at an Oklahoma City airport Friday contained a bullhorn that played Christmas music, some wiring and part of a cell phone, officials said.

Tweet Be the first to Tweet this!ShareThis Will Rogers Airport spokeswoman Karen Carney said the wiring and cellphone parts were what alerted security officials when the taped-up cardboard box arrived on an incoming flight from Houston. It was discovered at a baggage claim carousel around 9:15 a.m.

Airport officials called police after hearing sounds coming from the box and everyone was ordered out of the ticket lobby and baggage-claim levels. That caused 30 flights to be cancelled or delayed and affected nearly 2,500 passengers, she said.

A bomb squad determined the package was harmless, and the FBI said the box's owner missed his flight and was apo